Expanding window-sash



UNITED STATES PATENT OFFICE.,

MIGHILL NUTTING, OF PORTLAND, MAINE.

EXPANDING WINDOW-SASH.

Specification of Letters Patent No. 9,331, dated October 12, 1852.

To all 'whom 'it may concern:

Be it known that I, MIGHILL NUTTING, of Portland, in the county ofCumberland and State of Maine, have invented certain new and usefulImprovements in the Construction of Expanding Vindow-Sashes, of whichthe following is a full, clear, and exact description, reference beinghad to the annexed drawing of the same, making part of thisspecification, and in which- Figure l, is a front elevation of a windowwith certain portions removed to expose the interior of the mechanismwhich constitutes my improvement, and Fig. 2 is a transverse section ofone side of a sash, taken through the line w of Fig. 1.

In operating my improved expanding sash for which I have vheretoforeapplied for Letters Patent, it is found that the friction producedbetween the edges of the sash, and the jambs of the window frame, by thesprings which constantly tend to expand the sash, render it dificult toraise or lower the sash because it involves too great an amount offorce.

The object of my present invention is to remedy this diiiiculty, and itconsists in arranging a lever in connection with two parts of the sashin such manner that the springs are compressed by the pressure of thehand upon the lever preparatory to moving the sash up or down, in asuiicient degree to reduce the friction between the sides of the jambsand the edges of the sash, so that the latter can be either raised orlowered as readily as a common non-expanding sash of the same weight,when it is free to move without binding. I have also applied anadjusting screw to the springs by means of which the sash can be made toexpand with a greater or less force as may be required.

The drawings represent a window frame A tted with an expanding sash B,in the manner invented by me, and fully described in a previousapplication for a patent, which escription need not therefore berepeated ere.

The narrow movable strip (C) at the side of the sash between which, andthe other portion of the sash, the springs are inserted, is connected bya link rod (D) with the vertical arm (E) of an elbow lever (F) pivotedto the side of the sash; the horizontal arm (G) of this lever extendsbeneath one of thc cross bars (H) of the sash, so that when the thumb isplaced upon the latter, and the first finger of the hand placed beneaththe horizontal arm (G) of the lever, and the thumb and finger thusplaced pressed toward eaclr other, the lever will turn and draw backfrom the jamb the strip, compressing the springs behind it, so as toreduce, or entirely remove the pressure of the edges of the sash againstthe jambs, thus allowing the sash to be raised, by the exertion ofbarely suffi cient force to overcome its weight, or allowing it to lowerby the action of gravity alone; in this way, the difficulty abovementioned in the use of my expanding sash is completely remedied.

It is obvious that the construction and arrangement of the lever forrelieving the sash from the pressure of the expanding springs, may bevaried almost infinitely without in the least degree changing theprinciple upon which it operates to relieve the sash, for so long as thelever is connected with the two parts in such manner that by thepressure of the hand it will draw them together against the tension ofthe springs, it will perform the oflice, which in this contrivance isassigned to it.

In making the springs for my improved expanding sash, it is found to bebest, and most convenient plan to make all of them strong enough for theheaviest sash of the number of lights for which they are adapted, andthen to temper or regulate their tension, or pressure against theexpanding strip, or between the two parts of the sash, by means of anadjusting screw (I) which in this instance is arranged to act upon amovable bottom or piston (J) in the socket which contains a helicalspring (K) to press against the strips so that when the bottom isadvanced, toward the mouth of the socket, the latter will be renderedshallower andy the tension of the spring correspondingly increased; andwhen the adjusting screw is turned in the opposite direction the movablebottom is caused to recede from the mouth of the socket, the tension ofthe springs is diminished, and the pressure of t-he edges of the sashagainst the jambs is reduced. In this manner the pressure and frictionof the edges of the sash against the jambs of the frame can be increasedor diminished at will, for any pressure for which it may be desirable toincrease or diminish it.

I have represented and described helical springs placed in sockets tocause the frame to expand, but any other kind of spring arranged in anyconvenient way, and having lent thereof, for limitingthe extent-of theits tension controlled by a set screw, may be expansion of the sashsubstantially as herein used. set forth.

Vhat I claim as my invention, vand desire In testimony whereof I havehereunto sub- 5 to secure by Letters Patent, isscribed my name.

The method of varying the pressure of the edges of the expanding sashagainst the jambs of the window frame, by means of the Witnesses:combination of the adjusting screws and P. H. WATSON, 10 springs, withthe set screws, or the equiva- E. S. RENWIG.

MIGHILL NUTTING.

